Guzman has pleaded not guilty to charges of running a massive drug trafficking ring and laundering billions of dollars as well as allegations of overseeing murders and kidnappings.

Delgado visited Guzman in Cefereso No. 9, a Mexican federal prison in Ciudad Juarez, frequently for seven months. She said Guzman was aware of the charges in the United States, but insisted he wasn't a drug kingpin.

"I don't know. I defended an agriculturalist. I have to believe what the client tells me," Delgado said. "If the client tells me 'I'm an agriculturalist' if the client hires me to defend him, that's what I'm going to do."